@cruxpay/js-sdk
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CruxPay Javascript SDK
143 lines (142 loc) • 7.81 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
import { ec } from "elliptic";
import { TokenSigner } from "jsontokens";
import { Encryption } from "../../packages/encryption";
import { getLogger } from "../../packages/logger";
import { getKeyPairFromPrivKey, getRandomHexString } from "../../packages/utils";
var log = getLogger(__filename);
var BasicKeyManager = /** @class */ (function () {
function BasicKeyManager(privateKey, getEncryptionKey) {
var _this = this;
this.signWebToken = function (payload) { return __awaiter(_this, void 0, void 0, function () {
var privateKey, signedMsg;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.initPromise];
case 1:
_a.sent();
return [4 /*yield*/, this.getDecryptedPrivateKey()];
case 2:
privateKey = _a.sent();
signedMsg = new TokenSigner("ES256K", privateKey).sign(payload);
privateKey = "0".repeat(privateKey.length);
return [2 /*return*/, signedMsg];
}
});
}); };
this.getPubKey = function () { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.initPromise];
case 1:
_a.sent();
return [2 /*return*/, this.publicKey];
}
});
}); };
this.deriveSharedSecret = function (publicKey) { return __awaiter(_this, void 0, void 0, function () {
var privateKey, curve, selfKey, userKey;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.getDecryptedPrivateKey()];
case 1:
privateKey = _a.sent();
curve = new ec("secp256k1");
selfKey = curve.keyFromPrivate(privateKey, "hex");
userKey = curve.keyFromPublic(publicKey, "hex");
privateKey = "0".repeat(privateKey.length);
return [2 /*return*/, selfKey.derive(userKey.getPublic()).toString(16)];
}
});
}); };
this.init = function (privateKey, getEncryptionKey) { return __awaiter(_this, void 0, void 0, function () {
var encryptionConstant, keyPair, _a, _b, _c;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
if (!getEncryptionKey) return [3 /*break*/, 2];
return [4 /*yield*/, getEncryptionKey()];
case 1:
encryptionConstant = _d.sent();
this.getEncryptionKey = getEncryptionKey;
return [3 /*break*/, 3];
case 2:
encryptionConstant = getRandomHexString();
this.ephemeralEncryptionConstant = encryptionConstant;
_d.label = 3;
case 3:
keyPair = getKeyPairFromPrivKey(privateKey);
this.publicKey = keyPair.pubKey;
_a = this;
_c = (_b = JSON).stringify;
return [4 /*yield*/, Encryption.encryptText(keyPair.privKey, encryptionConstant)];
case 4:
_a.encryptedPrivateKey = _c.apply(_b, [_d.sent()]);
privateKey = "0".repeat(privateKey.length);
return [2 /*return*/];
}
});
}); };
this.getDecryptedPrivateKey = function () { return __awaiter(_this, void 0, void 0, function () {
var encryptionConstant, encryptedPrivateKeyObject;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.initPromise];
case 1:
_a.sent();
if (!this.getEncryptionKey) return [3 /*break*/, 3];
return [4 /*yield*/, this.getEncryptionKey()];
case 2:
encryptionConstant = _a.sent();
return [3 /*break*/, 4];
case 3:
// assume that there is ephemeralEncryptionConstant set as fallback
encryptionConstant = this.ephemeralEncryptionConstant;
_a.label = 4;
case 4:
encryptedPrivateKeyObject = JSON.parse(this.encryptedPrivateKey);
return [2 /*return*/, Encryption.decryptText(encryptedPrivateKeyObject.encBuffer, encryptedPrivateKeyObject.iv, encryptionConstant)];
}
});
}); };
this.initPromise = this.init(privateKey, getEncryptionKey);
log.debug("BasicKeyManager initialised");
}
return BasicKeyManager;
}());
export { BasicKeyManager };